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2002 Chevrolet Silverado 4.3L Fault Codes P3401 and P3501 Explained

Model: 2002 Silverado Fault Code: P3401 Posted: 2016-02-19 19:10

I own a 2002 Chevrolet Silverado with a 4.3L V6 engine, and I'm currently encountering diagnostic trouble codes P3401 and P3500. Can someone please explain what these codes mean in the context of this vehicle? The truck is stock with no aftermarket modifications, and I've been advised to check for additional error codes before proceeding with repairs.

Related fault codes
P3401P3501
Comments (1)
Anonymous 2016-02-20 08:24

Are there any other diagnostic codes present? I recommend trying a different OBD2 scanner—many auto parts stores offer free scanning services. Codes P3401 and P3501 don't align logically with a 2002 Silverado V6 engine configuration. The vehicle is stock, so no aftermarket parts or modifications have been installed.